The battery is 3.7v, the voltage of the solar panel is 6v (two or more solar panels are connected in parallel), if the battery is 12v, the solar panel is 12v-18v (two or more solar panels in series)

1. Connect the battery to the controller with a cable. The wire is inserted into the end of the charge controller and the battery end to ensure that the positive terminal of the charge controller is connected to the positive pole of the battery and the negative pole is connected to the negative pole of the battery. The wire should be securely inserted into the end of the charge controller.

2. Connect the solar panel to the controller. According to the positive and negative signs of the solar panel and the controller, the positive pole is connected to the positive pole and the negative pole is connected to the negative pole. This step should be especially careful. If the solar panel is incorrectly connected, the reverse voltage will cause damage to the solar panel and the controller.

3. Connect the inverter to the battery with a battery wire loop. Make sure that the positive pole of the inverter is connected to the positive pole of the battery and the negative pole is connected to the negative pole If the positive and negative poles are reversed, the inverter will be damaged.